Increase 'max_fsm_queue' default

The old default was becoming too small for some workloads.

ejabberd.yml.example

@@ -444,7 +444,7 @@ shaper:
 ## This option specifies the maximum number of elements in the queue
 ## of the FSM. Refer to the documentation for details.
 ##
-max_fsm_queue: 1000
+max_fsm_queue: 10000
 
 ###.   ====================
 ###'   ACCESS CONTROL LISTS

src/ejabberd_redis.erl

@@ -45,7 +45,7 @@
 -define(SERVER, ?MODULE).
 -define(PROCNAME, 'ejabberd_redis_client').
 -define(TR_STACK, redis_transaction_stack).
--define(DEFAULT_MAX_QUEUE, 5000).
+-define(DEFAULT_MAX_QUEUE, 10000).
 -define(MAX_RETRIES, 1).
 -define(CALL_TIMEOUT, 60*1000). %% 60 seconds